As for the marijuana proposal itself, this isn't the first time Sanders has taken that stance. In fact, he's made this a talking point since the first Democratic debate, but his past relationship with the issue is a bit more hazy.

In 2001, Sanders co-sponsored a bill that would allow states to legalize the drug for medical uses. But when Katie Couric asked him about his thoughts on legalization earlier this year, Sanders dodged the question saying, "It's not my thing," voicing concerns that it might be a gateway drug.

1. He's a socialist, and he doesn't deny it. When he ran for office in 1990 he responded to an ad trying to link him to Fidel Castro by saying, "I am a socialist and everyone knows that."

(AP Photo/Toby Talbot, File)

2. He used to moonlight as a comedy actor, appearing in the 1999 film "My X-Girlfriends Wedding Reception."

(Photo by Win McNamee/Getty Images)

4. He made headlines in in 2010 when he tried to block a deal that included a tax cut extension for the wealthy with a filibuster-like stand. The stunt trended on Twitter with the hashtag #filibernie and later crashed the Senate video server.

Photographer: Andrew Harrer/Bloomberg via Getty Images

5. He is not religious. While all past presidents have been openly religious and Christian, Sanders says he identifies as Jewish but doesn't practice.

(Photo by Win McNamee/Getty Images)

7. He grew up in a working class family in Brooklyn, and his father was a Polish immigrant.

(Photo by Win McNamee/Getty Images)

8. He released an album called 'We Shall Overcome' in which he reads speeches about peace and justice with a choir singing in the background. It's available on iTunes.

(Photo By Bill Clark/Roll Call/Getty Images)

9. He is a big believer in Scandinavian political thinking and has said that the U.S. should adopt some of their principles, including the idea that health care should be a right, and higher education should be free.

(Photo By Bill Clark/CQ Roll Call)

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Sanders has never outright opposed marijuana, though. He has supported decriminalization -- which is different from legalization –- for a while, and has been a longtime opponent of the war on drugs.